Suppose that 14 children who were learning to ride two-wheel bikes were surveyed to determine how long they needed to use training wheels revealed that they used them an average of 6 months with a sample standard deviation of 3 months. Assume that the underlying population d normal. Which of the following correctly defines the random variable -? O A.- is the average time that all children will need to use training wheels O B. is the time that all children will need to use training wheels O C. is the underlying normal distribution for the population OD. -is estimated with the sample statistic of 3 months O E. is the average time that the 14 children needed to use training wheels

MATLAB: An Introduction with Applications
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Author:Amos Gilat
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Suppose that 14 children who were learning to ride two-wheel bikes were surveyed to determine how long they needed to use training wheels. It was
revealed that they used them an average of 6 months with a sample standard deviation of 3 months. Assume that the underlying population distribution is
normal. Which of the following correctly defines the random variable ?
O A.- is the average time that all children will need to use training wheels
O B. - is the time that all children will need to use training wheels
Oc.
is the underlying normal distribution for the population
O D.- is estimated with the sample statistic of 3 months
O E. - is the average time that the 14 children needed to use training wheels
Transcribed Image Text:Suppose that 14 children who were learning to ride two-wheel bikes were surveyed to determine how long they needed to use training wheels. It was revealed that they used them an average of 6 months with a sample standard deviation of 3 months. Assume that the underlying population distribution is normal. Which of the following correctly defines the random variable ? O A.- is the average time that all children will need to use training wheels O B. - is the time that all children will need to use training wheels Oc. is the underlying normal distribution for the population O D.- is estimated with the sample statistic of 3 months O E. - is the average time that the 14 children needed to use training wheels
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